Electrolytic corrosion steel low-power corrosion device
By designing the circulation pump and electrode plates of the electrolytic corrosion device to control current corrosion, the problems of short acid life and unsafe operation are solved, and safe and efficient low-magnification corrosion detection is achieved.
Patent Information
- Application Number
- CN202422054658.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-08-23
AI Technical Summary
When existing low-magnification corrosion devices are used to detect steel defects, the acid solution has a short service life, is unsafe to operate, and the corrosion effect is difficult to meet standards.
An electrolytic corrosion device is designed, which includes a clean water tank, a pickling tank and an acid storage tank. It is made of polyvinyl chloride and is equipped with a circulation pump and an electrode plate. The current corrosion and cleaning process of the electrode plate is controlled by an electric control box to avoid long-term acid immersion.
It improves the service life of the acid, operational safety and corrosion effect, meets the low-magnification corrosion detection standards, optimizes the working environment and avoids excessive corrosion.
Smart Images
Figure CN223332867U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of low-magnification inspection equipment for continuous casting billets, and more specifically relates to a low-magnification corrosion device for electrolytic corrosion of steel. Background Art
[0002] The macroscopic corrosion test is a method for examining the internal quality of ingots. During the test, the ingot is cut and the specimen to be tested is milled. The specimen is then placed in a prepared acid solution and subjected to an electric current for a specified period of time. As the degree of corrosion increases on the test surface, some defects generated during the cooling and crystallization of the ingot are revealed, such as central porosity, segregation, cracks, and inclusions. Defects are then graded based on their distribution against standards. "GB / T226-2015 Steel - Macroscopic Structure and Defects Acid Etching Method" involves electrolytic corrosion of cross-sections of continuously cast ingots to examine defects such as central porosity, intermediate cracks, and inclusions formed during the casting process. It also reveals the distribution of fine-grained, columnar, and equiaxed regions on the ingot surface. Utility Model Content
[0003] The purpose of the utility model is to provide an electrolytic corrosion steel low-magnification corrosion device, which can prolong the service life of the acid solution, is convenient and safe to operate, and can also make the corrosion effect reach the detection standard of low-magnification corrosion.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an electrolytic corrosion steel low-magnification corrosion device, including a clean water tank, a pickling tank and an acid storage tank, a first pipe is arranged between the acid storage tank and the pickling tank, a first circulation pump is arranged on the first pipe, a second pipe is arranged between the clean water tank and the acid storage tank, a second circulation pump is arranged on the second pipe, electrode plates are respectively arranged on both sides of the inner cavity of the pickling tank, and the two electrode plates are respectively electrically connected to the positive and negative poles of the mains power, the inner cavity of the pickling tank is used to place the sample and make the sample located between the two electrode plates, the electrolytic corrosion steel low-magnification corrosion device also includes an electrical control box, and the mains power is electrically connected to the two electrode plates through the electrical control box.
[0005] In a possible implementation, the clean water tank, the pickling tank, and the acid storage tank are all made of polyvinyl chloride with a thickness of 3 mm to 8 mm.
[0006] In a possible implementation, first mounting grooves are respectively provided on both sides of the inner cavity of the pickling tank, and the two electrode plates are longitudinally inserted into the first mounting grooves.
[0007] In a possible implementation, the electrode plate is made of stainless steel 316 and has a thickness of 5 mm.
[0008] In a possible implementation, a second mounting groove is provided at the bottom of the inner cavity of the pickling tank, and the upper end of the second mounting groove is provided with a plurality of positioning sockets for positioning and mounting the sample.
[0009] In a possible implementation, a water injection pipe is provided above the clean water tank, a drainage pipe is provided at the bottom of the clean water tank, and valves are provided on both the water injection pipe and the drainage pipe.
[0010] In one possible implementation, the inner diameters of the first and second pipelines are 45 mm to 55 mm, the first circulation pump can realize the forward or reverse flow of the acid liquid in the first pipeline, and the second circulation pump can realize the forward or reverse flow of the clean water in the second pipeline.
[0011] In a possible implementation, a voltage regulating module is provided inside the electric control box, and the voltage regulating module is used to regulate the voltage of the mains electricity to electrically connect the two electrode plates.
[0012] In a possible implementation, a current contactor is further provided inside the electric control box.
[0013] The beneficial effect of the low-magnification corrosion device for electrolytic corrosion of steel provided by the utility model is that: compared with the existing technology, when using the device, the sample is first placed in the pickling tank, the first circulation pump is turned on in the forward direction, and the acid in the acid storage tank enters the pickling tank through the first pipe. The electrical control box controls the two electrode plates to connect to the mains to form a positive pole and a negative pole, so that corrosion current flows on both sides of the sample in the pickling tank to corrode the sample. After the corrosion is completed, the second circulation pump is turned on in the forward direction, and the acid in the pickling tank flows back to the acid storage tank through the first pipe. The second circulation pump is turned on in the forward direction, and the clean water in the clean water tank enters the pickling tank through the second pipe to soak and clean the sample, and finally uses a hair dryer to dry it for inspection. When using the low-magnification corrosion device for electrolytic corrosion of steel provided by the utility model, first place the sample and then add the acid, and then add clean water for cleaning after the corrosion is completed. The sample will not be over-corroded due to long-term immersion in acid solution, and the service life of the acid solution is improved. In addition, compared with hot acid corrosion, this device does not have a heating process. Although the acid solution temperature will rise under the action of current, it will not be too high. The acid gas concentration is low, the working environment is optimized, and the operation is convenient and safe. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0015] Figure 1 A schematic structural diagram of a low-magnification electrolytic corrosion device for steel provided in an embodiment of the present utility model;
[0016] Figure 2 A top view of a pickling tank provided in an embodiment of the present utility model;
[0017] Figure 3 This is a front view of the electric control box provided in an embodiment of the utility model.
[0018] In the figure: 1. Clean water tank; 2. Pickling tank; 3. Acid storage tank; 4. First pipeline; 5. First circulation pump; 6. Second pipeline; 7. Second circulation pump; 8. Electrode plate; 9. Test sample; 10. Electric control box; 11. First installation slot; 12. Second installation slot; 13. Positioning socket; 14. Water injection pipe; 15. Drain pipe. DETAILED DESCRIPTION
[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0020] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.
[0021] In the claims, specification and the above-mentioned drawings of the present utility model, unless otherwise expressly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present utility model.
[0022] See also Figure 1Now, an electrolytic corrosion steel low-magnification corrosion device provided by the present invention is described. An electrolytic corrosion steel low-magnification corrosion device includes a clean water tank 1, a pickling tank 2 and an acid storage tank 3. A first pipe 4 is provided between the acid storage tank 3 and the pickling tank 2. A first circulation pump 5 is provided on the first pipe 4. A second pipe 6 is provided between the clean water tank 1 and the acid storage tank 3. A second circulation pump 7 is provided on the second pipe 6. Electrode plates 8 are respectively provided on both sides of the inner cavity of the pickling tank 2. The two electrode plates 8 are electrically connected to the positive and negative poles of the mains electricity respectively. The inner cavity of the pickling tank 2 is used to place a sample 9 and make the sample 9 located between the two electrode plates 8. The electrolytic corrosion steel low-magnification corrosion device also includes an electric control box 10. The mains electricity is electrically connected to the two electrode plates 8 through the electric control box 10.
[0023] The present invention provides a low-magnification electrolytic corrosion device for steel. Compared with the prior art, when using the device, the sample 9 is first placed in the pickling tank 2, the first circulating pump 5 is turned on in the forward direction, and the acid in the acid storage tank 3 enters the pickling tank 2 through the first pipe 4. The electrical control box 10 controls the two electrode plates 8 to connect to the mains to form a positive electrode and a negative electrode, so that corrosion current flows on both sides of the sample 9 in the pickling tank 2 to corrode the sample 9. After the corrosion is completed, the second circulating pump 7 is turned on in the reverse direction, and the acid in the pickling tank 2 flows back to the acid storage tank 3 through the first pipe 4. The second circulating pump 7 is turned on in the forward direction, and the clean water in the clean water tank 1 enters the pickling tank 2 through the second pipe 6, soaking and cleaning the sample 9, and finally using a hair dryer to dry it for inspection. When using the low-magnification electrolytic corrosion device for steel provided by the present invention, the sample 9 is first placed and then the acid is added. After the corrosion is completed, clean water is added for cleaning. Sample 9 will not be over-corroded due to long-term immersion in acid solution, and the service life of the acid solution is improved. In addition, compared with hot acid corrosion, this device does not have a heating process. Although the acid solution temperature will rise under the action of electric current, it will not be too high. The acid gas concentration is low, the working environment is optimized, and the operation is convenient and safe.
[0024] Specifically, the clean water tank 1, pickling tank 2, and acid storage tank 3 are all made of polyvinyl chloride (PVC). PVC exhibits good resistance to general acids and alkalis. To improve the acid resistance of the clean water tank 1, pickling tank 2, and acid storage tank 3, acid-resistant fillers can be added to the PVC during manufacture to increase their acid resistance. The clean water tank 1, pickling tank 2, and acid storage tank 3 all have a rectangular box structure with a thickness of 3mm-8mm, preferably around 5mm. These three test tanks can be configured in different sizes, depending on the size and number of specimens 9.
[0025] See also Figure 2 First mounting grooves 11 are respectively provided on both sides of the inner cavity of the pickling tank 2 , and the two electrode plates 8 are longitudinally inserted into the first mounting grooves 11 .
[0026] Specifically, longitudinal plates are arranged relatively parallel on both sides of the same end of the inner cavity of the pickling tank 2, and the inner ends of the longitudinal plates are relatively bent and extended. The gap between the two longitudinal plates is slightly larger than the width of the electrode plate 8, generally 1-2 mm larger than the width of the electrode plate 8, and the distance between the bent and extended ends and the inner wall of the pickling tank 2 is slightly larger than the thickness of the electrode plate 8, generally 0.5-1 mm larger than the thickness of the electrode plate 8.
[0027] The electrode plate 8 is made of 316 stainless steel with a thickness of 5 mm. The electrode plate 8 made of 316 stainless steel is not easily corroded and has a long service life.
[0028] See also Figure 2 The bottom of the inner cavity of the pickling tank 2 is provided with a second mounting groove 12. The upper end of the second mounting groove 12 is provided with multiple positioning sockets 13 for positioning and mounting the specimens 9. The inner contour of the positioning sockets 13 is adapted to the outer contour of the specimens 9. The multiple specimens 9 are inserted into the multiple positioning sockets 13 in a one-to-one correspondence to maintain stability. After the multiple specimens 9 are inserted into the multiple positioning sockets 13, the distance between adjacent specimens 9 is maintained at approximately 10 mm, with a deviation of no more than ±1 mm.
[0029] See also Figure 1 A water injection pipe 14 is provided above the clean water tank 1, and a drain pipe 15 is provided at the bottom of the clean water tank 1. Valves are provided on both the water injection pipe 14 and the drain pipe 15. Clean water is added to the clean water tank 1 through the water injection pipe 14. In addition, after the pickling soaking, the sample 9 can be removed from the pickling tank 2 and placed in the clean water tank 1. Clean water is then injected into the clean water tank 1 through the water injection pipe 14 to clean the sample 9, which is more effective. The drain pipe 15 can discharge the clean water after cleaning. The valves on the water injection pipe 14 and the drain pipe 15 can realize the opening and closing of the water injection pipe 14 and the drain pipe 15.
[0030] Specifically, the inner diameter of the first pipe 4 and the second pipe 6 is 45 mm to 55 mm. In this embodiment, the first pipe 4 and the second pipe 6 are connected by a diameter of 50.8 mm. The first circulation pump 5 can realize the forward or reverse flow of the acid solution in the first pipe 4 by forward and reverse rotation, and the second circulation pump 7 can realize the forward or reverse flow of the clean water in the second pipe 6 by forward and reverse rotation.
[0031] See also Figure 3The electric control box 10 is an existing product, which is a box structure as a whole. The upper part of the outer end surface is provided with a voltage display area and a current display area, the middle part is a time relay, and the lower part is provided with a power indication area, a time alarm area and an operation indication area side by side. The bottom part is provided with a stop button, a start button and a time adjustment button side by side. Correspondingly, the electric control box 10 is equipped with an ammeter, a voltage transformer, a relay, a voltage regulating module and a current contactor. The current transformer is used to monitor the test current and display it in the current display area. The voltmeter is used to detect the test voltage and display it in the voltage display area. The relay is used to set the time, which is generally set at 30 minutes. When the set time is reached, the time alarm area starts to flash, indicating that the experiment is over. The voltage regulating module is used to adjust the voltage of the mains. The voltage regulating module is used to adjust the voltage to <36V and the current to <400A in the standard, which is suitable for electrolytic corrosion experiments. The current contactor has a power-off function in an emergency to eliminate safety hazards.
[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A low-magnification electrolytic corrosion device for steel, characterized in that: The invention comprises a clean water tank (1), a pickling tank (2) and an acid storage tank (3), wherein a first pipe (4) is provided between the acid storage tank (3) and the pickling tank (2), and a first circulation pump (5) is provided on the first pipe (4), a second pipe (6) is provided between the clean water tank (1) and the acid storage tank (3), and a second circulation pump (7) is provided on the second pipe (6), and electrode plates (8) are respectively provided on both sides of the inner cavity of the pickling tank (2), and the two electrode plates (8) are respectively electrically connected to the positive electrode and the negative electrode of the mains electricity, and the inner cavity of the pickling tank (2) is used for placing a sample (9) and making the sample (9) be located between the two electrode plates (8). The electrolytic corrosion steel low-magnification corrosion device also comprises an electric control box (10), and the mains electricity is electrically connected to the two electrode plates (8) through the electric control box (10).
2. The electrolytic steel low-magnification corrosion device according to claim 1, characterized in that: The clean water tank (1), the pickling tank (2) and the acid storage tank (3) are all made of polyvinyl chloride and have a thickness of 3 mm to 8 mm.
3. The electrolytic steel low-magnification corrosion device according to claim 1, characterized in that: First mounting grooves (11) are respectively provided on both sides of the inner cavity of the pickling tank (2), and the two electrode plates (8) are longitudinally inserted into the first mounting grooves (11).
4. The electrolytic steel low-magnification corrosion device according to claim 1, characterized in that: The electrode plate (8) is made of stainless steel 316 and has a thickness of 5 mm.
5. The electrolytic steel low-magnification corrosion device according to claim 1, characterized in that: A second mounting groove (12) is provided at the bottom of the inner cavity of the pickling tank (2), and the upper end of the second mounting groove (12) is provided with a plurality of positioning sockets (13) for positioning and mounting the sample (9).
6. The electrolytic steel low-magnification corrosion device according to claim 1, characterized in that: A water injection pipe (14) is provided above the clean water tank (1), a drainage pipe (15) is provided at the bottom of the clean water tank (1), and valves are provided on both the water injection pipe (14) and the drainage pipe (15).
7. The electrolytic steel low-magnification corrosion device according to claim 1, characterized in that: The inner diameters of the first pipe (4) and the second pipe (6) are 45 mm to 55 mm. The first circulation pump (5) can realize the forward or reverse flow of the acid liquid in the first pipe (4), and the second circulation pump (7) can realize the forward or reverse flow of the clean water in the second pipe (6).
8. The electrolytic steel low-magnification corrosion device according to claim 1, characterized in that: A voltage regulating module is provided inside the electric control box (10), and the voltage regulating module is used to regulate the voltage of the mains electricity to electrically connect the two electrode plates (8).
9. The low-magnification electrolytic corrosion device for steel according to claim 8, characterized in that: A current contactor is also provided inside the electric control box (10).